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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2019) map unicode process-internal codepoints to replacement character
Date Fri, 30 Oct 2009 23:05:59 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12772154#action_12772154
] 

Robert Muir commented on LUCENE-2019:
-------------------------------------

i guess the final thing I will say, is the inconsistency of treating U+FFFF special, without
being consistent and treating the entire category (noncharacter) the same way.

This is what lead to the index corruption bug in the first place after all, if you look at
it from a unicode perspective and not from a java perspective. 


> map unicode process-internal codepoints to replacement character
> ----------------------------------------------------------------
>
>                 Key: LUCENE-2019
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2019
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>            Reporter: Robert Muir
>            Priority: Minor
>         Attachments: LUCENE-2019.patch
>
>
> A spinoff from LUCENE-2016.
> There are several process-internal codepoints in unicode, we should not store these in
the index.
> Instead they should be mapped to replacement character (U+FFFD), so they can be used
process-internally.
> An example of this is how Lucene Java currently uses U+FFFF process-internally, it can't
be in the index or will cause problems. 

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